Graphical user interface for a display screen or a portion thereof



FIG. 1 is a front view of an image of a graphical user interface for adisplay screen or a portion thereof;

FIG. 2 is a front view of a second image thereof; and,

FIG. 3 is a front view of a third image thereof.

The appearance of the image transitions sequentially among the imagesshown in FIGS. 1-3. The process or period in which an image transitionsto another forms no part of the claimed design.

The broken line showings of portions of a display screen in the figuresare environmental only and form no part of the claimed design.

CLAIM The ornamental design for a graphical user interface for a displayscreen or a portion thereof, as shown and described.